How to grow spinach in Australia
Also known as: English Spinach
True spinach is a cool-season crop with a narrower growing window than most Australian gardeners expect. It bolts to flower the moment days get long and warm, which means a Melbourne summer planting goes to seed within weeks. The trick is to grow spinach in autumn, winter, and early spring — or to substitute warm-climate alternatives like silverbeet or warrigal greens through the hot months. Genuine spinach grown at the right time of year, picked young, is incomparable to the supermarket version.
When to plant
Spinach needs cool conditions to grow well — between 10–20°C is ideal. Days longer than 13 hours combined with heat trigger bolting.
May to August in the dry season. Spinach is marginal in tropical climates — even the dry season is warm. Try warrigal greens (native Australian spinach) as a more reliable substitute.
April to August. Cool-season window is productive. Avoid spring plantings — lengthening days trigger immediate bolting.
March to August. Excellent autumn-to-winter spinach window. Plants bolt by October as days lengthen.
March to August. Melbourne's cool climate suits spinach well. A March planting produces autumn through winter.
February to August. Hobart and Canberra have one of the longest spinach windows in Australia. Plant from late summer through autumn for a long productive period.
April to July. Inland winters suit spinach well.
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Open the full planting calendar →How to plant
Spinach can be direct-sown or grown from seedlings. Direct sowing is more reliable — spinach roots are sensitive and transplant stress can accelerate bolting.
Spacing: 15–20cm between plants. Crowded spinach produces small leaves and bolts faster.
Depth: 1cm deep. Seeds germinate in 1–2 weeks.
Soil: Rich, well-drained soil with plenty of compost. Spinach is a heavy feeder. Slightly alkaline pH (6.5–7.0) preferred.
Succession planting: Sow a small batch every 3 weeks through the suitable cool season for continuous harvest.
No transplanting: Don't try to move spinach seedlings once they've emerged — root disturbance frequently triggers bolting.
Pots, raised beds, or in-ground?
Spinach grows well in all three options.
In-ground is the standard.
Raised beds suit spinach particularly well — improved drainage prevents root rot and soil quality matters for productivity.
Pots are an excellent option. A 25cm wide pot supports 6–8 spinach plants. Wide shallow planters work well. Pots can be moved to follow cool conditions — onto a north-facing balcony in winter for warmth, into shade in spring as days lengthen.
Sunlight & water
Full sun in cool weather; part shade extends the season as days warm.
Water consistently. Dry conditions accelerate bolting and produce small bitter leaves.
When and how to harvest
Harvest outer leaves as needed, leaving the central growing point intact. New leaves emerge from the centre as long as the plant remains in leaf production mode. Pick leaves when they're 10–15cm long for the best flavour and texture.
Once the plant starts to bolt — the central stem lengthens and points upward, leaves get smaller and more arrow-shaped — leaf quality declines quickly. Harvest everything remaining within a few days and start a new planting.
Spinach stores in the fridge for about a week wrapped in damp paper. Best used fresh.
Common problems
Bolting is the main spinach issue. Almost always caused by timing (planted too late into the warm season) or day length (long days trigger bolting regardless of temperature). The fix is timing.
Leaf miner causes white trails in leaves. Cosmetic; cut affected leaves and use the rest.
Downy mildew in humid conditions. Improve airflow; water at soil level.
Slow germination in cold soil is normal. Spinach germinates best between 10–20°C.
Companion planting
Plant near: Brassicas, peas, beans, strawberries.
Keep away from: Climbing beans (shade conflicts).
Australian varieties
Bloomsdale — Classic crinkled-leaf variety. Sweet flavour, productive. The standard. Heritage variety.
Tyee — Slow-bolt variety, stays in production longer than most. Useful in warm temperate climates.
Galileo — Modern hybrid bred for bolt resistance. Smooth leaves.
English Spinach — Generic name for traditional spinach types. Confirm specific cultivar from supplier.
Warrigal Greens (Tetragonia tetragonioides) — Native Australian "spinach" — actually a different plant entirely, but used as a hot-weather spinach substitute. Heat-tolerant, perennial in warm climates, traditional Aboriginal food plant. Worth growing in tropical and subtropical climates where true spinach struggles.
Pet safety
Pet safety information is provided as a general guide only. If your pet has consumed any plant material, contact your vet or the Animal Poisons Helpline on 1300 869 738 immediately.